246 lines
9.7 KiB
C#
246 lines
9.7 KiB
C#
using System;
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using System.Diagnostics;
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using System.Net;
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using System.Text.Json;
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using System.Threading;
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using System.Threading.Tasks;
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using FATrace.OEMApp.Model.Jellyfin;
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using NLog;
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using RestSharp;
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namespace FATrace.OEMApp.Services
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{
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/// <summary>
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/// Jellyfin 客户端配置选项
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/// </summary>
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public sealed class JellyfinClientOptions
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{
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/// <summary>
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/// Jellyfin 基础地址，例如：http://192.168.0.30:8096
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/// </summary>
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public required string BaseUrl { get; init; }
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/// <summary>
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/// API 密钥（建议使用 Jellyfin 后台创建的密钥）。
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/// </summary>
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public required string ApiKey { get; init; }
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/// <summary>
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/// 超时时间，毫秒。默认 10000 毫秒。
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/// </summary>
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public int TimeoutMs { get; init; } = 10000;
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/// <summary>
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/// 是否将 api_key 作为查询参数传递。默认 true。
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/// 若为 false，则通过请求头 X-Emby-Token 传递。
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/// </summary>
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public bool UseQueryApiKey { get; init; } = true;
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/// <summary>
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/// 自定义 User-Agent。若为空将使用默认。
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/// </summary>
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public string? UserAgent { get; init; }
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}
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/// <summary>
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/// Jellyfin HTTP 异常
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/// </summary>
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public sealed class JellyfinHttpException : Exception
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{
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public HttpStatusCode StatusCode { get; }
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public string? ResponseContent { get; }
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public JellyfinHttpException(string message, HttpStatusCode statusCode, string? content, Exception? inner = null)
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: base(message, inner)
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{
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StatusCode = statusCode;
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ResponseContent = content;
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}
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}
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/// <summary>
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/// Jellyfin API 客户端封装（基于 RestSharp）
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/// </summary>
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public sealed class JellyfinClient : IJellyfinClient, IDisposable
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{
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private static readonly Logger Logger = LogManager.GetCurrentClassLogger();
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private readonly RestClient _client;
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private readonly JellyfinClientOptions _options;
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private readonly JsonSerializerOptions _jsonOptions = new()
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{
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PropertyNameCaseInsensitive = true
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};
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public JellyfinClient(JellyfinClientOptions options)
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{
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_options = options ?? throw new ArgumentNullException(nameof(options));
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if (string.IsNullOrWhiteSpace(_options.BaseUrl))
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throw new ArgumentException("BaseUrl 不能为空", nameof(options));
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if (string.IsNullOrWhiteSpace(_options.ApiKey))
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throw new ArgumentException("ApiKey 不能为空", nameof(options));
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if (!Uri.TryCreate(_options.BaseUrl, UriKind.Absolute, out var baseUri))
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{
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throw new ArgumentException($"无效的 BaseUrl: {_options.BaseUrl}", nameof(options));
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}
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var restOptions = new RestClientOptions(baseUri)
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{
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MaxTimeout = _options.TimeoutMs,
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ThrowOnAnyError = false,
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// UseUnsafeSerializer = false // 保持默认 System.Text.Json
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};
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_client = new RestClient(restOptions);
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// 默认头
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_client.AddDefaultHeader("Accept", "application/json");
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_client.AddDefaultHeader("Accept-Charset", "utf-8");
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if (!string.IsNullOrWhiteSpace(_options.UserAgent))
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{
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_client.AddDefaultHeader("User-Agent", _options.UserAgent);
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}
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// 通过 Header 传递 Token（若未使用 Query）
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if (!_options.UseQueryApiKey)
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{
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_client.AddDefaultHeader("X-Emby-Token", _options.ApiKey);
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}
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}
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/// <summary>
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/// 获取 Jellyfin Items 列表。
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/// </summary>
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/// <param name="parentId">父级目录/库 ID</param>
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/// <param name="sortBy">排序字段（默认 DateCreated）</param>
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/// <param name="sortOrder">排序方向（Ascending/Descending，默认 Descending）</param>
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/// <param name="limit">限制返回数量，默认 10</param>
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/// <param name="includeItemTypes">包含的类型（例如 Movie, Series），默认 Movie</param>
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/// <param name="cancellationToken">取消令牌</param>
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public async Task<JellyfinItemsResponse> GetItemsAsync(
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string parentId,
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string sortBy = "DateCreated",
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string sortOrder = "Descending",
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int? limit = 10,
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string includeItemTypes = "Movie",
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CancellationToken cancellationToken = default)
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{
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if (string.IsNullOrWhiteSpace(parentId))
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throw new ArgumentException("parentId 不能为空", nameof(parentId));
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var request = new RestRequest("Items", Method.Get);
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request.AddQueryParameter("ParentId", parentId);
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if (!string.IsNullOrWhiteSpace(sortBy)) request.AddQueryParameter("SortBy", sortBy);
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if (!string.IsNullOrWhiteSpace(sortOrder)) request.AddQueryParameter("SortOrder", sortOrder);
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if (limit.HasValue && limit.Value > 0) request.AddQueryParameter("Limit", limit.Value.ToString());
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if (!string.IsNullOrWhiteSpace(includeItemTypes)) request.AddQueryParameter("IncludeItemTypes", includeItemTypes);
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if (_options.UseQueryApiKey)
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{
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request.AddQueryParameter("api_key", _options.ApiKey);
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}
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return await ExecuteAndDeserializeAsync<JellyfinItemsResponse>(request, cancellationToken).ConfigureAwait(false);
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}
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/// <summary>
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/// 仅返回 Items 列表的便捷方法。
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/// </summary>
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public async Task<System.Collections.Generic.IReadOnlyList<JellyfinItem>> GetItemsOnlyAsync(
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string parentId,
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string sortBy = "DateCreated",
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string sortOrder = "Descending",
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int? limit = 10,
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string includeItemTypes = "Movie",
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CancellationToken cancellationToken = default)
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{
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var resp = await GetItemsAsync(parentId, sortBy, sortOrder, limit, includeItemTypes, cancellationToken).ConfigureAwait(false);
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return resp.Items ?? new System.Collections.Generic.List<JellyfinItem>();
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}
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private async Task<T> ExecuteAndDeserializeAsync<T>(RestRequest request, CancellationToken ct)
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{
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var sw = Stopwatch.StartNew();
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try
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{
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Logger.Info("Jellyfin 请求: {Method} {Resource}", request.Method, request.Resource);
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var response = await _client.ExecuteAsync(request, ct).ConfigureAwait(false);
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sw.Stop();
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if (!response.IsSuccessful)
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{
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Logger.Warn("Jellyfin 响应失败: Status={StatusCode}, Elapsed={Elapsed}ms, ContentLength={Length}",
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(int)response.StatusCode, sw.ElapsedMilliseconds, response.Content?.Length ?? 0);
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throw new JellyfinHttpException(
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$"请求失败，HTTP {(int)response.StatusCode} {response.StatusDescription}",
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response.StatusCode,
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response.Content,
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response.ErrorException);
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}
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if (string.IsNullOrWhiteSpace(response.Content))
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{
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throw new JellyfinHttpException("响应内容为空", response.StatusCode, null);
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}
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var result = JsonSerializer.Deserialize<T>(response.Content, _jsonOptions);
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if (result == null)
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{
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throw new JellyfinHttpException("响应反序列化失败，返回结果为 null", response.StatusCode, response.Content);
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}
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Logger.Debug("Jellyfin 调用成功: {Method} {Resource}, Elapsed={Elapsed}ms", request.Method, request.Resource, sw.ElapsedMilliseconds);
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return result;
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}
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catch (OperationCanceledException)
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{
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sw.Stop();
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Logger.Warn("Jellyfin 请求被取消: {Resource}, Elapsed={Elapsed}ms", request.Resource, sw.ElapsedMilliseconds);
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throw;
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}
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catch (JellyfinHttpException)
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{
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// 已包含上下文，直接抛出
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throw;
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}
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catch (Exception ex)
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{
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sw.Stop();
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Logger.Error(ex, "Jellyfin 请求异常: {Resource}, Elapsed={Elapsed}ms", request.Resource, sw.ElapsedMilliseconds);
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throw new JellyfinHttpException("请求执行异常", HttpStatusCode.InternalServerError, null, ex);
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}
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}
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public void Dispose()
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{
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// RestClient 在新版本基于 HttpClient，通常无需显式释放。
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// 如需自定义 HttpMessageHandler，可在此释放。
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}
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}
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/// <summary>
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/// Jellyfin 客户端接口，便于后续依赖注入与单元测试。
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/// </summary>
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public interface IJellyfinClient
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{
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Task<JellyfinItemsResponse> GetItemsAsync(
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string parentId,
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string sortBy = "DateCreated",
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string sortOrder = "Descending",
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int? limit = 10,
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string includeItemTypes = "Movie",
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CancellationToken cancellationToken = default);
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Task<System.Collections.Generic.IReadOnlyList<JellyfinItem>> GetItemsOnlyAsync(
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string parentId,
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string sortBy = "DateCreated",
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string sortOrder = "Descending",
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int? limit = 10,
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string includeItemTypes = "Movie",
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CancellationToken cancellationToken = default);
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}
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}
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